Dog-operating device



Dec, 26, 1922.

fE, A. BARTEZKI.

Dec. 26, 1922.

1E. A. BARTEZK I Dos OPERATING DEVICE. FILED Nov. l5, 15H9` 2 SHEETS-SHEET 2 y @y I W W A TTUR/V innemen nee ne, reza,

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TonZZ 'whom t may concern:

lie it known that l, 19Min il. llnrnzlii,

a citizen oi the United States, residing at,

its structure is embodied the ordinary plun-y ger-type of such a device and also means ior actuating the sarnehy means oi'a screw. lt is converti-ble irornon'e of these :tor-Ins to y the lother and vice versa. Means is pro:

vided for yholding the parts fior actuation in one of these ways and `for releasing the saine so as 'to he actuated in the other Inanner. For oil or light grease, it will be used in its plunger form; andk for thiclrgrease or in cold weather whenlight grease solidiiiesit will be used with the screw forceieed.

In the accompanying drawings forming part oi: this specification, in which like nurnliers ol' reference denote like parts wherever they occur, v y

Figure 1 is a sideelevation, with internal parts shown in dotted lines;

Figure 2 is a longitudinal sectional. view taken on the line 2 2 in Figure 1; p l

Figure 3 is a sectional view taken on the line. 3-3 in Figure 1; A

.Figure l is a view similar to Figure 3, 1out with the parts in a different position;

Figure 5 is a View taken on the line 5-5 in Figure 3;

Figures 6 and 7 are details of the retaining and transforming cap; and

Figure 8 is a modiication of Figure 3,

The plunger 5 is preferably composed of resilient gasket-like material, such for instance as cork 6, having a pair of plates 7 and 8 lying on the inner and outer side of' the said resilient ineznher 6. 'The shoulder 9 ol? screw 10 ahuts against plate 7, and nut 11 forces the plunger 5 into such abut*- ting position and holds it there. The plunger 5 is free to turn upon the plain stern 12 of screw 10.

Screw 10 is long enough` to extend from one end to the other of the interior of cylinder 1 and through the `passage 13 (which is not screw-threaded) through cap 14, which screws at 15 upon `one end of cylinder 1. i

y plunger `screwthreaded. v J

. lllhen the parts, particularly` thejdog 16, are in the position shown in Figure L1the screw 10 is used asA a screw tocause the` plunger 5to travel in either direction.` Rotation of handwheel 1l' causes screw `10 to windet dog-16 and the` movement `oi the s in either direction, dependent upon the direction oi? rotation of wheel 17.`

Enlevement of `dog 16 out of engagement with serewlOito the position shown in Figure 3 `resultsin,` leaving screw-member 10 reeto rnove yhaclrand forth as `an ordinary plunger-rod, inasmuch as passage 13 ,is not A ring 18 revolubly `mounted `ori-hubV of cap 14, having a pair of earn-faces 20 and l21 isvy adapted to `movepdog.16 either into orout oi engagement with screw 10:,when the said calnflis rotatedwin `one direction orI the other.` v y y .Dog 116 `lies in slot-v22 in `huh 19 ,and rocks therein on pin 23, which lies in groove/241` andiinore pzuticularly'in the 'flatteuedfpart 25otgroovel24.. y

lneend of dog 16 is provided with teeth 26, i which areadapted to ymesh with the l threads of screw `10 `when ,engegedthere with, as shown in Figure 1. The opposite end of dog 16 is plain7 and screw 10 can slide past dog 16 when dog 16 hasbeen tilted to the position shown in Figure 3. The device isused as Slidable plunger when dog 16 is in the position shown inv Figure 3and"is used as a screw feed when dog 16 is in the positionshown in Figure 4. Pin 23 fits in a notch 27 in dog 16.

l Dog 16 is provided withy a pair of upwardly projecting lugs 28 and 29, adapted to be engaged respectively by `the cam-faces 2O and 21 on the inside of ring 18. Ring 18 eneircles huh 19. When rotated in one direction the cani-face 21`on the interior of ring 18 engages lug v28 and thereby forces teeth 26 into engagement with screw 10. Movement in the opposite direction not only releases' lug 28 from pressure ot cam-face 20, but when continued causes cam-face 20` to engagelug `29, which results in dog 16 `being rocked on pin 23, whereby teeth 26 areunrneshedfrom screw 10 andheld away therefrom. Screw protrudes into groove 24 andholdsring 18 inv'place. Stop 31 orevents too great'rotationof ring 18. ent 32 1s for the escape oi' air, to prevent hinding.

The` binding of cam-faces 2O and Q1' upon i lugs 28 4and 29 is. so tight that this forms a sufficient lock` against looseningrotation ,of @ring 18. y

, lt desired, lug 29 and cam-tace' 20 may `be omitted, as shown in Figure, and aV spring 33, mounted` on a stemy 34, havingv a head 35, may be substituted theretor,the said spring being attached vto the toothed end vot-dog'l' and mounted in an opening 36 in y"ringl Bythis means, whenever vring'lS "is so rotated as to disengage cam 21 from stem Se, `springw will instantly e eirertapulll on the toothed end of dog 16,

vfrom the `spirit of this invention or the scope oftheollowingclaims.' y

A'l claim: 1. rl`he .combination with a feed screw and member thru which said screw passes, yotadog pivotally supported. by said member, said dog provided on one side ot' the pivot `with a smooth portion adapted for sliding engagement with the screw and on the opposite side o 't the pivot witha toothed portion adapted for threaded engagement with the screw, and means for rocking said dog on its'pivot to engage either the smooth or the threaded portion with the screw, `said means comprising a rotatable member having a pair of 'diametricallyf'opposite `cam surfaces odset vertically to lie in planes one above the other and adapted to be suc-r cessively engagedwith'the dog on opposite sides of thepivot.

screw is adapted to pass, a pivot pin, a dog having a toothed'portion, the said dog *be` ing mounted in the slot in the said member on the said pivot pin and the said pivot 2. ln combination, a feed screw, a tubu klar Slotted memberthrough which the said pin traversing an intermediate part of the said dog,"said dog having end lugs extendlng laterally from theslot to project beyond the outer clrcumterential wall of said tubular member, and a rotatable ring en-V circling said member land provided with means for successively engagingv'said lugs to move the toothed portion of the doginto and out ol' engagementwith vsaid screw.

3. The combination with a feed screw, of -i La pivotally mounted dog having a toothed lportion at one side ofthe pivot adapted for threaded engagementiwith the screw, and a rotatable ring surrounding the screw and dog and carrying oppositely disposed cam surfaces offset to lie in diterent planes and adaptedto successively engage the dog on opposite sides ot the pivot to positivelyactuate the dog into and out ,of threaded4 vengagement with the screw.

' ln .testimony whereof I hereunto aiix my signature.

' EMIL A. BARTEZKI. f 

